Combing machine for wool, cotton, and the like



April 5, 1938. K. J. SCHMITT 2,113,061

COMBING MACHINE FOR WOOL, COTTON, AND THE LIKE Filed March 16. 1956 2 Sheets-Sheet 1 A ril 5, 1938. K. J. SCHMITT 2,113,061

COMBING MACHINE FOR WOOL, 'L'OTTCJN, AND THE LIKE Filed March 16. 1956 2 Sheets-Sheet 2 Patented Apr. 5, 1938 Karl Josef Schmitt, Ghemnitz, Germany, assignor to Sachsische Textilmaschinen-fabrik vormr Rich. Hartmann Aktiengesellschaft, Chemnitz,

Germany Application March 16, 1936, Serial No. 69,182

In Germany April 24, 1935 3 Claims.

This invention relates to a combing machine for W001, cotton, silk, hemp, flax and the like in which the grippers and the drawing-off cylinders are fixedly disposed and thedrawing-ofi is introduced by means of an adjustable movement of the feeding grid.

-In the known forms of construction of this type when it is desired to increase or decrease the length of the mass of threads which is to be combed by the round comb (displacement) it is necessary to adjust the drawing-off device correspondingly so that the distance of the clamping point of the cylinders from the grippers is larger or smaller. This adjustment is very troublesome and long as it must be effected with the greatest care in order to keep the distance of the drawing-off cylinders from the grippers exactly constant over the entire length.

In order to avoid this difficulty it has already been proposed to use two cams for the drive of the feeding grid, and in such a way that the feeding grid receives, in addition to the feeding and counter-feeding movement, an additional movement which is variable for the regulation of the quantity to be combed. The additional movement is a so-called pilgrim step which, with opened grippers, begins with a backward movement before combing. This known form of construction has the disadvantage that it requires a larger distance between the drawing-01f cylinders and the grippers (displacement) than corre-- sponds to the length of the mass of threads. The mass of threads to be combed by the round comb is also shortened on account of the backward movement of the feeding grid and reduces the efficiency of the machine.

According to the invention the arrangement is such that the additional movement of the feeding grid is carried out in one or the other direction and can thus begin with a forward or backward movement. By introducing the wandering step (pilgrim step) with a forward movement, a thread mass of greater length can be combed with a smaller displacement. If desired however the wandering step may be effected in the reverse direction, as for example, may be desired in the preparation of very short fibres, if the construction of the machine no longer allows a decrease of the displacement to the necessary extent. Moreover the arrangement simplifies the feeding of the thread mass into the drawing-off device.

In carrying out the wandering step beginning with a forward movement the fixed comb, connected in the usual manner with the feeding grid, is brought close to the lower grippers on account of the backward movement occurring with the opening of the grippers. On this account the generally used reciprocally movable plate which serves to support the'thread mass is quite unnecessary. g

","The drawings showby way of example one form of construction according to the invention.

Fig. 1 shows the device in side elevation after thedrawing-off of the thread mass has ended. (position-of rest). a a

' Figs. 2 to 5 show the feeding device in the various operative positions when carrying out the wandering step with a'forwardmovement at the beginning, whilst Figs. 6 to 9 show the positions which the feeding device takes to facilitate the introduction of the thread mass in the drawing-off device.

In the drawings a designates the travelling belt conveyed between the drawing-off cylinders b, c designates the grippers, d the feeding-grid with the feeding comb e adapted to be folded up and down, and f the fixed comb. The feeding comb is moved up and'down in the known manner by a bell-crank lever, not shown. The two cams for moving the feeding grid d backwards and forwards with the feeding comb e, are designated by h and i. The cam 71. actuates the feeding grid by means of a double lever k which with an adjustably disposed roller m rests on the lower arm of a double lever n with the otherarm of which the feeding grid is connected. The cam 12 shown dotted gives the additional movement to the feeding grid by means of a double lever 0'. This has on each arm an adjusting screw p and q respectively which alternatively act on the upper arm of the double lever according as to whether an increase or decrease of the displacement is required. A helical spring 1' keeps the double lever 11, with its lower arm against the roller of the double lever is so that the rollers of this and therefore also of the double lever oare pressed against the cams h and i.

The condition shown corresponds to an increase in the displacement. On rotation of the cams in the direction of the arrow, the camz' acts first and causes, by means of the double lever o, the movement of the feeding grid by the part of the pilgrim step in the direction of the arrow (path I, Fig. 2). The feeding comb e is now raised in the usual way from the wool in the feeding grid d. After this has taken place, a swinging of the double lever 11. in the opposite direction to that indicated in Fig. 2 is effected by the cam 72. and the double lever is, so that the feeding grid at is withdrawn (counter feeding, see

path II, Fig. 3). When this finishes, the feedin comb e again drops into the wool and the feeding grid is drawn back by the extent of the wandering movement through the influence of the cam i (see path III, Fig. 4). This movement is followed immediately or with a slight interval by the feeding movement (see path IV, Fig. 5)

caused by the cam h acting on the double lever is.

The actual feeding movement takes place slowlyso that the thread mass is drawn off gradually.

If the displacement has to be decreased, the adjusting screw p is unscrewed and the adjusting screw q is screwed up so that the latter bears on the upper arm of the doublelever k. According as the adjusting screw is screwed up to a greater or lesser degree it is possible to vary the displacement as desired within the given limits so asto obtain an increase or decrease.

In the operations according to Figs. 3 to 5 the displacement is influenced as the forward and backward movements of the feeding grid take place before the closing of the grippers, that is before the combing of the fibre tuft. If, however, it is desired to employ the arrangement for facilitating the feed of the fibre tufts to the drawing-off device, this can be effected by delaying the pulling back of the feeding grid until after the combing. The feeding grid will then be pulled back after the combing first into the position shown in Fig. 6 for the purpose of countor-feeding (path II) and then-pulled back once the distance of the pilgrim step (path III, Fig. 7). The feeding grid serves then for the purpose of introducing the fibre tuft into the drawing-0E device pushed forward the distance of the pilgrim step (Fig. 8, path I) and finally the distance of the feed (Fig.9, path IV). These movements of the feeding grid can be carried out as desired inconjunction with or without the displacement adjustment.

I claim:- I

.1. Acombing machine for W001, cotton and the like, comprising in combination stationary nippers,'stationary detaching cylinders in front of said nippers, a feeding gridv behind said nippers,

a double-armed lever, means for connecting one arm of said lever with said feeding grid, a second double armed lever, an adjustable roller on one arm of said second double armed lever bearing against the free arm of said first double armed lever, a cam acting upon. the other arm of said second double armed lever, a'third double armed lever at the side of said second double armed lever, a second cam adapted to act upon one arm of said third double-armed lever, an adjustable stop on the said one arm of said third doublearmed lever, and an adjustable stop on the other arm of said third double armed lever adapted to actuate said second double armed lever to increase or decrease the additional forward or backward movement of said feeding grid, and a spring adapted to pull the free arm of said first double armed lever against said roller of said second double armed lever.

2. A combing machine for wool, cotton and the like, comprisingin combination stationary nippers, stationary detaching cylinders-in front of said nippers, a feeding grid behind said nippers, means forimparting feed and counter feed movements to said grid, means for imparting an additional pilgrim step movement to said feeding grid and comprising a lever system, and adjustable means for influencing said lever system and adapted to be independently operated to enable the pilgrim step movement to commence with a forward or backward movement.

3. A. combing machine for W001, cotton and the like, comprising in combination stationary nippers, stationary detaching cylinders in front of said nippers, afeeding grid behind said nippers,.means for imparting feed and counter feed movements to said grid, means for imparting an additional pilgrimstep movement to said feeding grid and comprising a lever system, and a pair of cams so pitched with respect to each other that the forward step of the pilgrim step movement is in the direction of the feeding movement of the-said feeding grid, and adjustable means. forming part of said lever system.

KARL JOSEF SCHMITT. 

